/**
* Fetch an image with wp_remote_get(), save it to $fullpath with a unique name.
* Will return an empty string if something went wrong.
*
* @param $url string
* @param $fullpath string
*
* @return string filename
*/
protected function fetchAndSaveUniqueImage($url, $fullpath)
{
// Cheap cache
static $already_done = array();
if (isset($already_done[$url])) {
return $already_done[$url];
}
$response = wp_remote_get($url, array('timeout' => $this->timeout));
// WordPress error?
if (is_wp_error($response)) {
// TODO: handle $response->get_error_message();
$already_done[$url] = '';
return '';
}
// Basename without query string
$filename = explode('?', basename($url));
// isolate latex image service from WP, add file extension
if ('s.wordpress.com' == parse_url($url, PHP_URL_HOST) && 'latex.php' == $filename[0]) {
$filename = md5(array_pop($filename));
// content-type = 'image/png'
$type = explode('/', $response['headers']['content-type']);
$type = array_pop($type);
$filename = $filename . "." . $type;
} else {
$filename = array_shift($filename);
$filename = sanitize_file_name(urldecode($filename));
$filename = Sanitize\force_ascii($filename);
}
$tmp_file = \PressBooks\Utility\create_tmp_file();
file_put_contents($tmp_file, wp_remote_retrieve_body($response));
if (!\PressBooks\Image\is_valid_image($tmp_file, $filename)) {
$already_done[$url] = '';
return '';
// Not an image
}
if ($this->compressImages) {
$format = explode('.', $filename);
$format = strtolower(end($format));
// Extension
\PressBooks\Image\resize_down($format, $tmp_file);
}
// Check for duplicates, save accordingly
if (!file_exists("{$fullpath}/{$filename}")) {
copy($tmp_file, "{$fullpath}/{$filename}");
} elseif (md5(file_get_contents($tmp_file)) != md5(file_get_contents("{$fullpath}/{$filename}"))) {
$filename = wp_unique_filename($fullpath, $filename);
copy($tmp_file, "{$fullpath}/{$filename}");
}
$already_done[$url] = $filename;
return $filename;
}
/**
* Load remote url of image into WP using media_handle_sideload()
* Will return an empty string if something went wrong.
*
* @param string $url
*
* @see media_handle_sideload
*
* @return string filename
*/
protected function fetchAndSaveUniqueImage($url)
{
if (!filter_var($url, FILTER_VALIDATE_URL)) {
return '';
}
$remote_img_location = $url;
// Cheap cache
static $already_done = array();
if (isset($already_done[$remote_img_location])) {
return $already_done[$remote_img_location];
}
/* Process */
// Basename without query string
$filename = explode('?', basename($url));
$filename = array_shift($filename);
$filename = sanitize_file_name(urldecode($filename));
if (!preg_match('/\\.(jpe?g|gif|png)$/i', $filename)) {
// Unsupported image type
$already_done[$remote_img_location] = '';
return '';
}
$tmp_name = download_url($remote_img_location);
if (is_wp_error($tmp_name)) {
// Download failed
$already_done[$remote_img_location] = '';
return '';
}
if (!\PressBooks\Image\is_valid_image($tmp_name, $filename)) {
try {
// changing the file name so that extension matches the mime type
$filename = $this->properImageExtension($tmp_name, $filename);
if (!\PressBooks\Image\is_valid_image($tmp_name, $filename)) {
throw new \Exception('Image is corrupt, and file extension matches the mime type');
}
} catch (\Exception $exc) {
// Garbage, don't import
$already_done[$remote_img_location] = '';
unlink($tmp_name);
return '';
}
}
$pid = media_handle_sideload(array('name' => $filename, 'tmp_name' => $tmp_name), 0);
$src = wp_get_attachment_url($pid);
if (!$src) {
$src = '';
}
// Change false to empty string
$already_done[$remote_img_location] = $src;
@unlink($tmp_name);
return $src;
}
/**
* Extract url from zip and load into WP using media_handle_sideload()
* Will return an empty string if something went wrong.
*
* @param string $href original filename, with (relative) path
*
* @see media_handle_sideload
*
* @return string filename
* @throws \Exception
*/
protected function fetchAndSaveUniqueImage($href)
{
$img_location = $href;
// Cheap cache
static $already_done = array();
if (isset($already_done[$img_location])) {
return $already_done[$img_location];
}
/* Process */
// Basename without query string
$filename = explode('?', basename($href));
$filename = array_shift($filename);
$filename = sanitize_file_name(urldecode($filename));
if (!preg_match('/\\.(jpe?g|gif|png)$/i', $filename)) {
// Unsupported image type
$already_done[$img_location] = '';
return '';
}
$image_content = $this->getZipContent($img_location, false);
if (!$image_content) {
$already_done[$img_location] = '';
return '';
}
$tmp_name = $this->createTmpFile();
file_put_contents($tmp_name, $image_content);
if (!\PressBooks\Image\is_valid_image($tmp_name, $filename)) {
try {
// changing the file name so that extension matches the mime type
$filename = $this->properImageExtension($tmp_name, $filename);
if (!\PressBooks\Image\is_valid_image($tmp_name, $filename)) {
throw new \Exception('Image is corrupt, and file extension matches the mime type');
}
} catch (\Exception $exc) {
// Garbage, Don't import
$already_done[$img_location] = '';
return '';
}
}
$pid = media_handle_sideload(array('name' => $filename, 'tmp_name' => $tmp_name), 0);
$src = wp_get_attachment_url($pid);
if (!$src) {
$src = '';
}
// Change false to empty string
$already_done[$img_location] = $src;
return $src;
}
/**
* Extract url from zip and load into WP using media_handle_sideload()
* Will return an empty string if something went wrong.
*
* @param $url string
* @param string $href original filename, with (relative) path
*
* @see media_handle_sideload
*
* @return string filename
* @throws \Exception
*/
protected function fetchAndSaveUniqueImage($url, $href)
{
$path_parts = pathinfo($href);
$dir = @$path_parts['dirname'];
$img_location = $dir ? "{$dir}/{$url}" : $url;
// Cheap cache
static $already_done = array();
if (isset($already_done[$img_location])) {
return $already_done[$img_location];
}
/* Process */
// Basename without query string
$filename = explode('?', basename($url));
$filename = array_shift($filename);
$filename = sanitize_file_name(urldecode($filename));
if (!preg_match('/\\.(jpe?g|gif|png)$/i', $filename)) {
// Unsupported image type
$already_done[$img_location] = '';
return '';
}
$image_content = $this->getZipContent("{$dir}/{$url}", false);
if (!$image_content) {
// Could not find image?
try {
// case where $url is '../Images/someimage.jpg'
$trimUrl = ltrim($url, './');
$image_content = $this->getZipContent($this->basedir . $trimUrl, false);
if (!$image_content) {
throw new \Exception('Could not import images from EPUB');
}
} catch (\Exception $e) {
$already_done[$img_location] = '';
return '';
}
}
$tmp_name = $this->createTmpFile();
file_put_contents($tmp_name, $image_content);
if (!\PressBooks\Image\is_valid_image($tmp_name, $filename)) {
try {
// changing the file name so that extension matches the mime type
$filename = $this->properImageExtension($tmp_name, $filename);
if (!\PressBooks\Image\is_valid_image($tmp_name, $filename)) {
throw new \Exception('Image is corrupt, and file extension matches the mime type');
}
} catch (\Exception $exc) {
// Garbage, Don't import
$already_done[$img_location] = '';
return '';
}
}
$pid = media_handle_sideload(array('name' => $filename, 'tmp_name' => $tmp_name), 0);
$src = wp_get_attachment_url($pid);
if (!$src) {
$src = '';
}
// Change false to empty string
$already_done[$img_location] = $src;
return $src;
}
/**
* Extract url from zip and load into WP using media_handle_sideload()
* Will return an empty string if something went wrong.
*
* @param string $img_id
*
* @return string
*/
protected function fetchAndSaveUniqueImage($img_id)
{
// Cheap cache
static $already_done = array();
if (isset($already_done[$img_id])) {
return $already_done[$img_id];
}
/* Process */
// Get target path
$img_location = $this->getTargetPath(self::IMAGE_SCHEMA, $img_id);
// Basename without query string
$filename = explode('?', basename($img_location));
$filename = array_shift($filename);
$filename = sanitize_file_name(urldecode($filename));
if (!preg_match('/\\.(jpe?g|gif|png)$/i', $filename)) {
// Unsupported image type
$already_done[$img_id] = '';
return '';
}
$image_content = $this->getZipContent($img_location, false);
if (!$image_content) {
// try a different directory in the zip container
try {
$alt_img_location = 'word/' . $img_location;
$image_content = $this->getZipContent($alt_img_location, false);
if (!$image_content) {
throw new \Exception('Image could not be retrieved in the DOCX file with PressBooks\\Import\\Ooxml\\fetchAndSaveUniqueImage()');
}
} catch (\Exception $exc) {
$this->log($exc->getMessage());
$already_done[$img_location] = '';
return '';
}
}
$tmp_name = $this->createTmpFile();
file_put_contents($tmp_name, $image_content);
if (!\PressBooks\Image\is_valid_image($tmp_name, $filename)) {
try {
// changing the file name so that extension matches the mime type
$filename = $this->properImageExtension($tmp_name, $filename);
if (!\PressBooks\Image\is_valid_image($tmp_name, $filename)) {
throw new \Exception('Image is corrupt, and file extension matches the mime type');
}
} catch (\Exception $exc) {
// Garbage, Don't import
$already_done[$img_location] = '';
return '';
}
}
$pid = media_handle_sideload(array('name' => $filename, 'tmp_name' => $tmp_name), 0);
$src = wp_get_attachment_url($pid);
if (!$src) {
$src = '';
}
// Change false to empty string
$already_done[$img_location] = $src;
return $src;
}
